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<?php $strings = "Football / Germany / 1.Liga Football / Germany / 1.Liga Football / Germany / 2.Liga Football / Germany / 2.Liga Football / Germany / 2.Liga Football / England / 1.Liga Football / England / 1.Liga Football / England / 2.Liga Football / England / 2.Liga Football / England / 3.Liga Hockey / Germany / 1.Liga Hockey / Germany / 1.Liga Hockey / Germany / 2.Liga Fechten / Meisterschaft Fechten / Meisterschaft Fechten / Weltmeister"; $lines = explode("\n", $strings); $array = array(); foreach($lines as $line) { $values = explode(' / ', $line); $depth = 0; foreach($values as $value) { if(!in_array($value, $array[$depth])) $array[$depth][] = $value; $depth++; } } var_dump($array);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 0 in /in/eseQK on line 27 Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /in/eseQK:27 Stack trace: #0 /in/eseQK(27): in_array('Football', NULL) #1 {main} thrown in /in/eseQK on line 27
Process exited with code 255.

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